Abstract
The possibility of future TL and ESR dating of icy materials in the outer planet world in our solar system is discussed. considering radiation effects by solar wind protons and cosmic rays as well as the long lifetime of radical species at extremely low ambient temperatures. A lightweight portable ESR and a gas combustion heating type TL using a photodetector are described for the in-situ observation, i.e. for the use on a landing craft with a -further suggestion to develop remote TL and OSL using laser beams. Both TL and ESR studies of ice (solid H 2O doped with H 2SO 3 were made to estimate the lifetimes of SO 3 − at the ambient temperature for comets from the Arrhenius plot of lifetimes. Molecular orbital calculation and g-factors of SO 3 − were made with MOPAC software. It is suggested that both ESR and optical dating of icy materials are useful for future dating in planetary science.
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